What is the least common factor of 6 and 9?

To answer the question, "What is the least common factor of 6 and 9?", we will start by defining and listing factors of 6 and 9.

Factors of 6 are all the integers that when multiplied by another integer equal 6. Likewise, factors of 9 are all the integers that when multiplied by another integer equal 9.

The factors of 6 are 1, 2, 3, and 6.

The factors 9 are 1, 3, and 9.

When you ask, "What is the least common factor of 6 and 9?", least is the key word here. Least means smallest. Thus, the smallest or least common factor that 6 and 9 have in common is 1.

Note that all integers, such as 6 and 9, have 1 as one of its factors. Thus, the answer to the least common factor of any two integers greater than 0 will always be 1.

Now that you know the least common factor of 6 and 9, you may also be interested in knowing the greatest common factor of 6 and 9. The greatest factor 6 and 9 have in common, per the list above, is 3.

When you asked for the least common factor of 6 and 9, did you mean least common multiple? If so, the least common multiple of 6 and 9 is 18.

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